• Brad King's avatar
    Link libraries by full path even in implicit directories · 882f48e5
    Brad King authored
    When CMP0003 was first introduced we wanted to link all libraries by
    full path.  However, some projects had problems on platforms where
    find_library would find /usr/lib/libfoo.so when the project really
    wanted to link to /usr/lib/<arch>/libfoo.so and had been working by
    accident because pre-CMP0003 behavior used -lfoo to link.
    We first tried to address that in commit v2.6.0~440 (Teach find_library
    to avoid returning library paths in system directories, 2008-01-23) by
    returning just "foo" for libraries in implicit link directories.  This
    caused problems for projects expecting find_library to always return a
    full path.  We ended up using the solution in commit v2.6.0~366 (...
    switch library paths found in implicit link directories to use -l,
    2008-01-31).  However, the special case for libraries in implicit link
    directories has also proven problematic and confusing.
    Introduce policy CMP0060 to switch to linking all libraries by full path
    even if they are in implicit link directories.  Explain in the policy
    documentation the factors that led to the original approach and now to
    this approach.